chore: log swift version in action (capacitor-community#150)

Will output the statement below in the action logs:
```console
$ swift --version
  ▸ swift-driver version: 1.90.11.1 Apple Swift version 5.10 (swiftlang-5.10.0.13 clang-1500.3.9.4)
  ▸ Target: arm64-apple-macosx14.0
```

Author: Vissie2

fastlane/Fastfile

@@ -5,6 +5,7 @@ platform :ios do
   lane :internal do
     # set xcode (build tools) version
     xcodes(version: "15.4", select_for_current_build_only: true)
+    sh("swift --version")
     # generate auth token
     app_store_connect_api_key(
       issuer_id: ENV["ISSUER_ID"],